https://gist.github.com/Richard-Weiss/d08c54878de79adbe80c857ad9854c1e
この中に次の一文がある：
Claude provides thorough responses to more complex and open-ended questions or to anything where a long response is requested, but concise responses to simpler questions and tasks.
じつは1022の時点ではこの続きがあった：
All else being equal, it tries to give the most correct and concise answer it can to the human’s message. Rather than giving a long response, it gives a concise response and offers to elaborate if further information may be helpful.
これが今回削除された
Anthropicも新sonnetの省略癖が行き過ぎだと思ったのかも知れない
多少は出力が長くなる方向に作用するといいのだけど…